DNS issue with BIND and ISPConfig - Repost

I am having trouble with BIND and pointing websites to the right directory. I have ISPConfig3 running to manage the server but made a few wrong entries and lost some functionality for a specific domain.

In addition, if it is necessary, I would like the server updated to the most secure and efficient version possible.

Please let me know if you have experience with these types of issues and programs and the server must remain active and online most of the time.